Aminomethylene derivatives and ultraviolet absorbent comprising thereof

Abstract

PCT No. PCT/JP97/03536 Sec. 371 Date Mar. 26, 1999 Sec. 102(e) Date Mar. 26, 1999 PCT Filed Oct. 3, 1997 PCT Pub. No. WO98/14423 PCT Pub. Date Apr. 6, 1998The present invention provides an aminomethylene derivative represented by general formula (I): wherein A is a cyclic oxo group selected from the group consisting of following general formulae (a), (b), (c), (d) and (e): wherein R1, R2, R3, R4 and R5 each independently represent H, an alkyl group or the like; R6, R7 and R8 each independently represent an alkyl group or the like; R1 and R2 or R7 and R8 may combine with each other to form a tetramethylene group or the like; R represents an alkyl group optionally containing OH or O; and n is an integer of 0 to 4, a process for the same, and the use thereof. The derivatives have an excellent ultraviolet absorption ability and a high optical stability.

What is claimed is: 
     
       1. An aminomethylene derivative represented by general formula (I): ##STR19## wherein A is a cyclic oxo group of following general formula (d): ##STR20## wherein R 6  is a group selected from the group consisting of linear or branched, saturated or unsaturated alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups, alkoxy groups, alkoxycarbonyl groups, acyl groups, dialkylamino groups and halogens, and R is a group selected from the group consisting of linear or branched, saturated or unsaturated alkyl groups, aralkyl groups, aryl groups, cycloalkyl groups and alkoxycarbonylalkylene groups, and n is an integer of 0 to 4 wherein when n is 2 or more, each of plural R 6  s can be different groups within the above-described groups. 
     
     
       2. A method for producing an aminomethylene derivative represented by general formula (I): ##STR21## wherein A is following general formula (d): ##STR22## wherein R 6  is a group selected from the group consisting of linear or branched, saturated or unsaturated alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups, alkoxy groups, alkoxycarbonyl groups, acyl groups, dialkylamino groups and halogens, and R is a group selected from the group consisting of linear or branched, saturated or unsaturated alkyl groups, aralkyl groups, aryl groups, cycloalkyl groups and alkoxycarbonylalkylene groups, and n is an integer of 0 to 4 wherein when n is 2 or more, each of plural R 6  s can be different groups within the above-described groups, wherein a cyclic oxo compound represented by general formula (II):   A'                                                         (II)     wherein A' is a compound of following general formula (d): ##STR23## wherein R 6  is a group selected from the group consisting of linear or branched, saturated or unsaturated alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups, alkoxy groups, alkoxycarbonyl groups, acyl groups, dialkylamino groups and halogens, and n is an integer of 0 to 4 wherein when n is 2 or more, each of plural R 6  s can be different groups within the above-described groups,     is allowed to react with an N-formylaminobenzoate derivative represented by general formula (III): ##STR24## wherein R is a group selected from the group consisting of linear or branched, saturated or unsaturated alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups and alkoxycarbonylalkylene groups,   in an organic solvent and in the presence of a halide.   
     
     
       3. A method according to claim 2, wherein said halide is a chloride.